Attachments not displaying in 'Attachment' tab.

Attachments not displaying in 'Attachment' tab.

We have a ticket which has 2 attachments displayed on the 'Conversation' tab, but we have decided we would like to delete one of them.
The problem we have, is the Attachments tab is not displaying that 2 attachments were uploaded - so we are unable to click on the 'More' dots and delete said attachments.
I have attached the 2 screen shots as a reference.

We have this issue with another ticket, but there are some tickets where the attachments are displaying correctly in both the Conversation Tab and the Attachments Tab - so it is inconsistent.
Thank you